Flex Duct Vs Sheet Metal Duct

Sheet metal ducts are less likely to incur dangerous mold and growths because their surfaces are non porous and smooth.

Flex duct vs sheet metal duct.

While sheet metal ductwork tends to be a better long. While they tend not to last as long as sheet metal they are very cost effective. Their shape and size also allows them to be installed in locations that would not accept full sized sheet metal ductwork. In comparison to metal duct flex duct is easier and faster to install.

I ve only been building since 1995 so i can t say for certain why we left the sheet metal guys behind but i suspect it was manly for cost reasons. Some sheet metal air ducts are lined with an external or internal fiberglass duct liner. This is because they re more versatile and flexible. In this video i ll make a case for going back to rigid metal ducts for your trunk lines and keeping your flexable ducts to the last 10 or less of a.

Flexible ducts are fairly easy to install and will often cost less than the rigid ductwork. Cost of installation supplies. 1 10 5 25 per foot insulated flexible duct 4 to 16 diameters used as branches or in radial duct attic systems 2 30 13 00 per foot round and oval sheet metal duct 3 to 8 diameters typically used for trunks in small homes and. Also i think spider webs are more likely to form in metal versus flex.

I have seen many leaky metal ducts in crawl spaces as well. Flexible ducts are made out of corrugated plastic often wrapped in insulation. Metal ducts are more rigid due to the nature of steel making them ideal to build an entire hvac system. Fiberglass lining is used to insulate air ducts from heat loss or to avoid condensation in cases where the supply air is very cold or there is a high ambient humidity in the plenum.

Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation.